crypto: sha-s390 - Fix warnings in import function

That patch should fix the warnings.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/arch/s390/crypto/sha256_s390.c b/arch/s390/crypto/sha256_s390.c
index 2bab519..61a7db3 100644
--- a/arch/s390/crypto/sha256_s390.c
+++ b/arch/s390/crypto/sha256_s390.c
@@ -53,10 +53,10 @@
 	return 0;
 }
 
-static int sha256_import(struct shash_desc *desc, const u8 *in)
+static int sha256_import(struct shash_desc *desc, const void *in)
 {
 	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
-	struct sha256_state *ictx = in;
+	const struct sha256_state *ictx = in;
 
 	sctx->count = ictx->count;
 	memcpy(sctx->state, ictx->state, sizeof(ictx->state));